Hello i need some help with some code that i am putting into a spredsheet, the spreed sheet lists computer equipment.

i have a collum that show if it has been installed

=IF(I15, yes,(H7 = H7+1))

I has a value of Yes when it has been installed and i need it to update H7 to show the number of items that have been installed but i can not get it to work is it possible to get this to work

thxs for the help